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Network Layer Secrecy Performance Of The Forwarding Functionality Using Dsa Generation

Sandhya.V*, Sharmila.R.V, Deepa.N

Published Mar 15, 2016• 0 citations
Publisher

Abstract

A full duplex system with sources, relay and destination nodes for secrecy communication in the presence of an eavesdropper is investigated. Using geometrical perspective the secrecy region of secrecy performance will be evaluated. Degradation of the detection performance for legitimate receiver is carried out. We consider the generation of a secret key (SK) by the inputs and the channel. Encryption is attained using the RC4 algorithm which generates the hash code. Source can decide the duplex. If the specified network is half duplex then the process will be one way communication otherwise it will be two way communication. Physical layer is the full duplex and half duplex relay network of the system performance. Full duplex process is accomplished by CSMA/CD.

DOI
10.5281/zenodo.47505

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A full duplex system with sources, relay and destination nodes for secrecy communication in the presence of an eavesdropper is investigated. Using geometrical perspective the secrecy region of secrecy performance will be evaluated. Degradation of the detection performance for legitimate receiver is carried out. We consider the generation of a secret key (SK) by the inputs and the channel. Encryption is attained using the RC4 algorithm which generates the hash code. Source can decide the duplex. If the specified network is half duplex then the process will be one way communication otherwise it will be two way communication. Physical layer is the full duplex and half duplex relay network of the system performance. Full duplex process is accomplished by CSMA/CD.
The open broadcast nature of the wireless networks makes it vulnerable to the eavesdropper attacks. The physical layer security (PLS) is a grown research field that exploits the characteristics of the physical wireless channel to prevent the eavesdropper interruptions and attacks. The use of the cooperative relay transmission is a method to approach the physical layer security. This paper studies the secrecy performance metrics of the half-duplex two-way multi-relaying technique. A cooperative jamming protocol is proposed to enhance the physical layer security, where the destination sends jamming signals to the eavesdropper node to degrade its channel capacity. However, the relays can act as a jammer and send jamming signals to the eavesdropper node. Moreover, Simulations of the performance metrics namely the secrecy capacity (Cs) and the secrecy outage probability (SOP) applied on the technique are presented and discussed to measure the secrecy level of the proposed technique compared with an existing technique namely half-duplex one-way multi-relaying technique. Based on simulations and discussions the proposed technique outperforms the existing technique in term of secrecy performance.
Abstract This paper examines physical layer security in a NOMA-based two-way wireless communication system with several decode-and-forward relays and a malicious eavesdropper. We implement a partial relay selection system to maximize the secrecy capacity of a specific user's information signal. Two hops are involved in the communication process because of the half-duplex relay cooperation. A selected relay receives information from two users. The relay strengthens the signals and broadcasts them during the second hop. Additionally, a jammer transmits a jamming signal that is known to all legitimate nodes but appears as noise with the received signals at the eavesdropper. Since legitimate user nodes are already aware of the jamming signal, channel status information, and self-information, they can decode the original information in downlink mode by self-interference and successive interference cancellation. Secrecy outage probability, intercept probability, and secrecy throughput have been investigated as metrics to analyze the security, where the secrecy performance of a particular user is found to increase by 94.66 %94.66\, \%94.66% with an increment in transmit SNR of jamming from 60 dB60\, dB60dB to 70 dB70\, dB70dB and increases by 90.78 %90.78\, \%90.78% with an increment in the number of relays from 2 to 5.
This paper considers the use of a friendly full-duplex (FD) relay to increase the secrecy rate over a fading channel between the legitimate source and destination in the presence of a naive or informed eavesdropper. Naive eavesdropper can only decode the received signals either from the source or from the relay, while informed eavesdropper can overhear signals transmitted from both the source and relay. Accordingly, we compare the achievable secrecy rates of FD relay with traditional half-duplex (HD) relay in terms of the channel state information (CSI) between nodes, eavesdropper types, and the self-interference (SI) in FD-Relay. We consider the non-convex power allocation problems for the developed FD-relay to maximize the secrecy rate under the power constraints and develop an efficient iterative algorithm based on the difference-of-two-concave-functions (DC) programming. The analytical and simulation results confirm that FD relay offers significant improvements in the secrecy rate over the HD-Relay.
Relaying is one of the useful techniques to enhance wireless physical-layer security. Existing literature shows that employing full-duplex relay instead of conventional half-duplex relay improves secrecy capacity and secrecy outage probability, but this is at the price of sophisticated implementation. As an alternative, two-path successive relaying has been proposed to emulate operation of full-duplex relay by scheduling a pair of half-duplex relays to assist the source transmission alternately. However, the performance of two-path successive relaying in secrecy communication remains unexplored. This paper proposes a secrecy two-path successive relaying protocol for a scenario with one source, one destination and two half-duplex relays. The relays operate alternately in a time division mode to forward messages continuously from source to destination in the presence of an eavesdropper. Analytical results reveal that the use of two half-duplex relays in the proposed scheme contributes towards a quadratically lower probability of interception compared to full-duplex relaying. Numerical simulations show that the proposed protocol achieves the ergodic achievable secrecy rate of full-duplex relaying while delivering the lowest probability of interception and secrecy outage probability compared to the existing half duplex relaying, full duplex relaying and full duplex jamming schemes.
This paper shows the secrecy performance of a network in which secure two-way communication is possible via two half duplex decode and forward (DF) relays with an eavesdropper (EAV) trying to decode the message. In the absence of direct link from source one (S1) to source two (S2), two-way communication is established in two time phases with the help of two half duplex DF relays, first one is in broadcast phase and second one is in relaying phase and two DF relays are named as DF relay one (DFR1) and DF relay two (DFR2). Each of the two relays is assisted with two directive antennas, one is receiving antenna and the other is transmitting antenna directed towards respective transmitting and receiving nodes. Thus, the EAV only receives the information from both sources only and does not receive the forwarded information signal of the relays. Matlab based simulation results, in terms of secrecy outage probability (SOP), have been shown to validate the results.
This paper proposes a bandwidth-efficient transmission protocol with one source, one destination and two assisting half-duplex relays. The two relays operate alternately in a time-division-duplex mode to forward messages from source to destination in the presence of an eavesdropper. Therefore, the source transmits new information continuously and the bandwidth efficiency of ideal full-duplex relay network can be achieved. The two relays provide higher diversity gain compared to the existing schemes assisted by one relay. By considering the achievable secrecy rate as the minimum between the secrecy rate of the S-R and R-D links, the achievable secrecy capacity can be improved. We investigate the performance of the protocol in terms of ergodic secrecy capacity and secrecy outage probability and compared to the existing half-duplex relaying, full-duplex relaying and full-duplex jamming schemes. The proposed protocol achieves the highest ergodic secrecy capacity and the lowest probability of secrecy outage compared to the existing schemes.